Welding-torch construction.



J. B. BURDETT.

WELDING TORCH CONSTRUCTION. APrLIoATIoN FILED DBO. 24, 1910.

Y1;;oo2,134. `d

Patented Aug'. 29, 1911.

mwaoeo UNITED STATES PATENT OFFICE. j R 4 Y Y JOHN B. BURDETL F CHICAGO, ILLINOIS, ASSIGNOLR.4 T0 NATINAL'PN-EUMATIC COMPANY, 0F CICAGO, ILLINUIS, A CORPORATIGN 0F DELAWARE.

wELnINe-roncn CONSTRUCTION.

1,002,134. Speeiation 0f Letters Patent Patented 7Aug. 29,1911. Application med neeembr 24, 1910. serial No. seais. i r

To alle whom it may'concem: to be screwed into thev interiorly t-hreaded Be 1t known that I, JOHN B. BtmDn'i'r, a portion of cap 1, and also with a centrally citizen of the United States, residing at arranged longitudinally extending bore or hicago, county of Cook, State of Illinois, channel 10, of uniform area throughout its 5 have made a ce1-tain new and useful Invenlength and constituting what I shall -term 604 tion in Welding-Torch Constructions, of the mixing channeL/ Interposed between which the following is a specification. the inner end surface of the shank portion The invention relates to welding or cut- 9 0f the tip and the base Wallv ofthe chamting torches, and particularly to torches of ber'iil head 1, is a cap piece 11 having a lo-the Class emplying aiV mixture 0f oxygen bearing surface coperating with the bear- 65 and acetylene to produce the welding or cut- 111g. Surface 7 t0 form a tight seat thereting Haine. against Centrally through the base of the The object of the invention is to provide Cep 11 V1S a bOre or duct 12 of reduced area a torch construction which is simple, ewlth reference to passage 2, but registering cient and economical to manufacture. With Said passage, and forming a'communi- 7o A `further object isto provide a torch tip Gatien heI'efrOIll which delivers directly Construction capable of being readily reabove the inner end of the mixing channel moved and replaced according to the char- 10, the mixing channel l10 being in alineacter of t-he work to be done. b -inent with the bore 12. On the surface of A further object of the invention is to its inner end the shank portion 9 is formed 75 provide a torch tip structure which secures Wlth a Shoulder 13 encircling a Harige 14 an eeient mixing 0f the component gases formed on said end surface to surround the employed to produce the welding or cutting entrance to the channel- 10. The flange of flame, and wherein the acetylene gas is de- Cap 11 bears against the shoulder 13 when livered to the mixing chamber of the torch the tip 8 is screwed into the `head 1, whereso tip by a suction or aspirating action proby the cap 11 is held and pressed firmly duced by the delivery of the oxygen under against its seat in the base of the chamber higher pressure. l Other objects of 'the' invention will apcap. which is juxtaposed with reference to 30 pear more fully hereinafter. the ange 14 is concaved, while the exterior 85 The invention consists substantially in surface of the Iiange 14 is convexed. l Comthe construction, combination, location and munication is'efected between the acetylene relative arrangement of parts, all as will gas supply passage 3 and the interior of the be more fully hereinafter set forth, as cap 11 through an opening 16, the interior shown in the accompanying drawing, and diameter of the iange of cap 11 being some- 90 finally pointed out in the appended claims. what greater than the exterior diameter of e single view of the drawing shows in the flange 14. The end 'of the bore 12y longitudinal section a welding torch tip through the' cap. which is presented toward structure embodying the principles of my the inner end of the mixing channel 10, may

40 invention. v y be reduced in area, if desired, to form an 95 In the drawing 1 designates the torch aspirating nozzle or injector. head or cap having an interiorly threaded In operation the oxygen'` under pressure chamber and passages 2, 3, delivering to is delivered through the passage 2 and said chamber,.the passage 2 communicating nozzle bore 12 into the mixing channel 10.

through pipe connection 4, with a source of By reason of the injector or suction l action 100 oxygensupply, and the passage 3 communiof the flow of oxygen under pressure, the .eating through a pipeor other connection 5 acetylene gasv under lower pressure is drawn with a source of acetylenegas supply. The from the passage 3 through opening 16, ogygen supply passage 2 delivers into the into` the interior of cap 11, and is carried 59 chamber of the head or `cap centrally along with the oxygen into the mixing chan- 105 through the base wall 6, thereof, said base nel, the linixd gases finally emerging from wall having a bearing seat surface 7, surthe. extremity 17 of the tip for nitionl to` rounding the delivery opening of said pasproduce the welding or cutting ame.A B sage 2. The tip 8 is provided with an exreason of the convexity of the exterior surteriorly threaded shank portion 9, adapted face of the ange' 14, and the concavity of 110 through -oxygen by which it is nel forming a mixing the inner juxtaposed surface of the cap 11, the' acetylene gas is given a whirling motion as it is drawn into t e mixing channel thereby enabling a more eicient mixture of the gases to be accomplished than otherwise would be possible. The opening 16, it will be seen, through which the acetylene as is drawn into the interior of the cap is formed at a. point adjacent the base of the liange 14. This gas 'in circulatin through the interior of the cap and around the exterior surface of the flange 14, is, as above indicated, given a whirling motion which materially aids in securing the desired intimate mixture thereof with the drawn into themix ing channel.

The torch construction embodying my invention is equally well adapted for welding and for cutting purposes. The controlling difference in the use of the device for the one or the other of these purposes is 'the difference in oxygen supply or thepressure under which it may be supplied. By merely varying the relative supply or pressure of the oxygen the device may be used for the one or the other purpose.

Having now set forth the object and nature of my invention, what 'I claim as new and useful, and of my own invention, and desire to secure by Letters Patent, is,

1. A torch comprising a head having a chamber, and high pressure and low pressure gas supply passages deliveringinto the chamber, a tip having a longitudinal chanchamber channel, and adapted to 'be removably secured in the chamber of said head, a cup-shaped cap removably interposed between the end of said tip and the base of the head chamber, and provided with a central bore through the end wall thereof and in line with the mixing chamber channel of the tip, and communicating with the high pressure gas supply passage, said cap havin an opening the side wall thereo communicata chambered head having ing with the low pressure gas supply pas-` sa e. Y

'JLIU a Welding torch, the' combination of high and low pressure gas 'supply passages and formed with a bearing surface encompassing the high pressure supply passage, a tip to be Aremovably secured in the head chamber and 'having a longitudinal channel forming a mixing channel and a shouldered inner end surface, and a cap havingI a bearing surface to seat against the bearing surface formed in the chambered headand `a iange to seat against the shouldered end surface of the tip, said cap having a central'bore of reduced area in line with the high pressure gas supply passage and the mixing channel, the liange of said cap having an opening communicating with the low pressure gas supply passage.

3. In a torch, a chambered head having high and low pressure gas supply passages, a tip adapted to be removably secured in the said head chamber, and provided with a longitudinal 'channel forming a mixing channel, and an-end flange `surroundingvthe inner end of said mixing channel, and a cap interposed between the inner end of the tipand the base of the head chamber andssurrounding saidflange, central bore delivering from the high pressure gas supply passage into the mixing channel, the inner surface of the cap being concaved and the outer surface of said ange being. convexed, said cap having an opening delivering from the low pressure said cap having a l gas supply passage to the space surrounding the flange. y

In testimony whereof I have hereunto set my hand in the presence of the subscribing witnesses,V on thislth day of December,

JOHN B. BURDETT. Witnesses: A

HUGH S. ADAMS,

HAROLD RowN'rREE. 

